Suppose you are working on a very old unix server where dos2unix, perl, tr, and sed are not present. How can you convert files from dos to unix format?
Answers:
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Method 1
I think you are referring to removing the caret-M at the end of lines. You can use search and replace in vi to do this.
In vi I normally do: (where “^” represents CTRL):
:%s/^V^M//g
Which shows on the screen as:
:%s/^M//g
Method 2
A server without tr or sed would have to be really old, or missing some basic commands. Hopefully ed is there; it existed in Unix first edition.
ed /path/to/file 1,$s/^V^M$// w q
where ^V^M means typing Ctrl+V then Ctrl+M (to enter a literal line feed). If you know that all lines do end in CR LF, you can use 1,$s/.$// instead (indiscriminately remove the last character on each line).
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